Reactions of 6-O-protected diazo derivatives 8, 9 and 10 with transition metals Rh(II) and Cu(II) under a variety of different conditions of solvents and temperatures, were studied in order to obtain 2-C-alkyl analogues of KDO. In fact, these types of products (11, 12) were obtained in good yields when Rh(II) was used as a catalyst in benzene. The interesting seven-membered ring products (13) were
的6-反应ø -保护的衍
生物重氮8,9和10在各种溶剂和温度的不同条件下与过渡
金属的Rh(II)和Cu(II),为了获得2-研究Ç烷基的类似物KDO。事实上,这些类型的产品(11,12时的Rh(II)被用作在苯中的催化剂以良好的收率获得)。有趣的七元环产物(13)仅在8和9时获得,因为使用Cu(II)催化剂时,单一的非对映异构体及其形成是有利的。